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Flashcards in Principles of Micro 3 Deck (25)
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1

composition of the cytoplasmic membrane

30-40% phospholipid
60-70% protein

with phospholipid bilayer having hydrophilic polar heads and hydrophobic fatty acyl tails

2

function of cytoplasmic membrane

transport
energy production (proton motive force, oxidative phosphorylation, photophosphorylation)
metabolic processes
motility
communication

3

types of transport system

passive: simple and facilitated(rate limited)
active

4

why is gram negative a significant barrier to antibiotics and disinfectants

because it has both a cytoplasmic membrane and an outer membrane

5

what do capsule make possible

makes it hard for the immune system to recognize bacteria -- but not all bacteria make capsules and not all that can make them

6

how do you tell difference between capsule and slime layer

capsule is thicker, a lot more of it, not easily removed, and organized while slime layer is the opposite

7

all vaccines are based on understanding what

understanding the capsule and capsular type

8

what is the diameter and length of fimbrae

2-10nm diameter
1-2 micron long

9

do fimbrae have proteins

yes

10

another name for fimbrae

short attachment or common pili

11

importance of pili

pull two cells together to exchange genetic information

12

diameter and length of pili

2-10nm diameter
10 - >20 microns long

13

in comparison to fimbrae, how much pili are there

a lot of fimbrae
few pili

14

protein in pili

pilin

15

descriptive form for no flagella

atrichous

16

descriptive form for single flagella at one end or both ends

polar

17

descriptive form for bunch of flagella at one end

lophotrichous

18

descriptive form for bunch of flagella at both ends

amphitrichous

19

descriptive form for flagella all around the cell

peritrichous

20

difference in prokaryotic and eukaryotic motility

in prokaryotes, the flagellum has propeller like motion

in eukaryotes, cilia has back and forth beating motion

21

filament is made of

flagellin

22

why do gram positive and gram negative produce the same energy

the energy comes from the basal body even though gram neg has plates at both outer membrane and cytoplasmic membrane while gram pos has only at cytoplasmic membrane.

since energy comes from the basal body, it doesn't matter that gram neg has two sets of plates

23

speed of bacteria

20-90 micrometer/sec

24

importance of endoflagellum spirochetes

digs deep into the mucus layer to get into the tissue it needs to get to

25

example of endoflagellum spirochetes

treponema pallidum